PoCoS: Potsdam coreference scheme

  • Authors:
  • Olga Krasavina;Christian Chiarcos

  • Affiliations:
  • Moscow State University;University of Potsdam

  • Venue:
  • LAW '07 Proceedings of the Linguistic Annotation Workshop
  • Year:
  • 2007

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Abstract

This document outlines minimal design principles underlying annotation of coreference relations in PoCoS, a scheme for cross-linguistic anaphoric annotation. We identify language-independent principles for markable identification which are essential for comparability of annotations produced for different languages. We further suggest a clear and motivated structure of annotation stages, the separation of a coarse-grained core and a family of more elaborate extended schemes, and strategies for the systematic treatment of ambiguity. Explicit mark-up of ambiguities is a novel feature. We implemented three instantiations of PoCoS for German, English and Russian applied to corpora of newspaper texts.